# A257468 (b-file synthesized from sequence entry) 1 1 2 1 3 6 4 1 5 15 6 90 7 1 8 28 9 70 10 420 11 2520 12 1 13 45 14 210 15 1260 16 3150 17 18900 18 113400 19 1 20 66 21 495 22 924 23 2970 24 13860 25 34650 26 83160 27 207900 28 1247400 29 7484400 30 1 31 91 32 1001 33 3003 34 6006 35 45045 36 84084 37 210210 38 270270 39 1261260 40 3153150 41 7567560 42 18918900 43 113513400 44 681080400